Carbon Dioxide → 6-Chloro-4-(6-(4-methylpiperazin-1-ylmethyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-benzimidazol-2-yl]-2-(2-trimethylsilanylethoxymethyl)-2H-pyridazin-3-one

Participants

Reaction Steps

6-Chloro-4-(6-formyl-1-(2-trimethylsilanylethoxymethyl)-1H-benzimidazol-2-yl]-2-(2-trimethylsilanylethoxymethyl)-2H-pyridazin-3-one is dissolved in dichloro-methane. 4-Methylpiperazine and acetic acid are added. After 15 minutes, sodium triacetoxyborohydride is added in several portions over the course of 3 hours. After conversion is complete, saturated aqueous NaHCO3 solution is added and the reaction solution is stirred until no further CO2 evolution is observed. It is diluted with dichloromethane, and the aqueous phase is extracted with dichloromethane. The combined organic phases are dried with MgSO4, and the solvent is removed in a rotary evaporator.

Provenance & Evidence